The Primary Maths Challenge, aimed at stuents in Years 5 and 6 (England and Wales, P6 and P7 Scotland, Years 6 and 7 Northern Ireland) has two rounds:
The main round: This papers is sat (in November) by a large number of students and the papers are marked by their own school. Schools ordering 10 papers get 1 gold, 2 silver and 3 bronze certificates and so there are no official grade boundaries for this paper. Whether a student gets a certificate will just depend on how well other students in their own school do. Note: there is now also a First Maths Challenge for students in younger years.
The bonus round: Schools send the main round scores to the Primary Maths Chellenge and the best scoring students are invited to take place in the Bonus Round (in February). In this round the awards are decided by the PMC organisers and grade boundaries for some recent years are listed in the table at the bottom of this page. Note, the sample size is relatively small for this paper so the boundaries should only be taken as a rough guide as to how well a student has done.
11+ Preparation course: I am in the process of creating an 11+ maths preparation course that is ideal for students at the Primary Maths Challenge age, whether or not they are applying for competitive entry examinations. Indeed it could also be good preparation for the Primary Maths Challenge!
Junior Maths Challenge: Able Year 6 (P7 Scotland, year 7 NI) students sometimes also enter for the Junior Maths Challenge, or otherwise take this in Years 7 and 8. When you are ready to move on from the Primary to the Junior Maths Challenge, the following online course will be useful:
Below you can find a video going through the 2018 Primary Maths Challenge Paper
Primary Maths Challenge Bonus Round Grade Boundaries: